Sheet-metal bezel for unbreakable clock-crystals



y 3 E. L. CARLSON 1,858,262

SHEET METAL BEZEL FOR UNBREAKABLE CLOCK CRYSTALS Filed Oct. 27, 1928Patented May 17, 1932- UNITED STATES PATENT OFFICE ELOF L. CARLSON, OFBRISTOL, CONNECTICUT, ASSIGNOR TO THE E. INGRAHAM CO., OF BRISTOL,CONNECTICUT, A CORPORATION SHEET-METAL BEZEL FOR UNBREAKABLECLOCK-CRYSTALS Application filed October 27, 1928. Serial No. 315,403.

My invention relates to an improvement in bezels for unbreakableclock-crystals, the object being to produce at a low cost formanufacture a bezel reduced to the simplest possible terms and yet beeflicient and attractive.

With these objects in view, my invention consists in a sheet-metal bezelfor unbreakable clock-crystals having certain details of construction aswill be hereinafter described.

In the accompanying drawings:

Fig. 1 is a view in front elevation of a nickel clock provided with myimproved bezel;

Fig. 2 is an edge view thereof;

Fig. 3 is an enlarged view thereof partly in vertical section and partlyin elevation;

Fig. 4 is a detached face view of the bezel;

Fig. 5 is a detached view of the bezel partly in section; and

Fig. 6 is a broken enlarged sectional View of the bezel and crystal.

In carrying out my invention, I produce from a piece of sheet-metal orbezel comprising a relatively-wide annular retainingfiange 7 anoffsetting stop-shoulder 8 larger in diameter than the diameter of thesaid flange, an inwardly-extending crystal-retaining flange 9 and acrystal-receiving groove 10 :1: located within the stop-shoulder 8 whichis interposed, as it were, between the said flanges 7 and 9. I

In the use of my improved bezel, an unbreakable crystal 11 is forcedinto it by any approved means, either by being initially bowed or bowedin the act of its introduction thereinto, the crystal being sufiicientlylarger in diameter than the groove 10 to maintain the crystal in bowedform after the edge of the crystal has been inserted into the saidgroove, in which it is retained by the effort of the crystal to flattenout and by the retainin -flange 9 of the bezel. The assemblingange 7 ofthe bezel is inserted into the forward edge of the sheet-metalclock-case 12 in which it is frictionally retained, being positionedwith respect to the case by the engagement of the projectingstop-shoulder 8 with the forward edge of the case, as clearly shown inFig. 2.

My improved bezel is not only eflicient in so far as mounting anunbreakable crystal is concerned, but cheap to produce, easily assembledand attractive in appearance. The other details of the clock may be ofany approved form and construction and do not concern my improved bezel,so long as the clock-case is open at the front for the reception of thesame.

I claim:

A sheet-metal bezel for clock-crystals, comprising a cylindricalassembly-flange adapted to be telescoped into a clock-case, a hollowstop-shoulder formed at the outer edge of the said flange and larger inoverall diameter 05 than the same, an inwardly-turned outwardly-inclinedretaining-flange forming an extension of the said stop-shoulder, and anannular groove located within the said hollow stop-shoulder; and aconcavo-convex unbreakable crystal having its edge inserted into thesaid annular groove in which it is retained under tension againstoutward dis placement by the said inwardly-turned outwardly-inclinedretaining-flange, with the 7.3 inner face of which its outer face,adjacent its edge, has surface-contact throughout the width of the saidflange for the exclusion of dust and for compensation for changes in thecrystal due to shrinkage. so

In testimony whereof, I have signed this specification.

ELOF L. OARLSON.

